California State Route 210 - Definition and Overview
California State Highway 210, also known as the Foothill Freeway, is a route that runs roughly East-West from Sylmar in the West to San Bernardino in the East.
The East-West section, that continues the Eastern path of the Ventura Freeway, out into the "Inland Empire" where a recently completed extention connects it to the 15 Freeway, a critical artery for traffic headed towards Nevada.